WorksheetsG7 Science Revision (S1M2)
Total questions: 45
Worksheet time: 51mins
The chart below shows the eye colours of a group of students.
Which eye colour is least common?
blue
brown
green
black
The chart below shows the hand-spans of a group of students.
What percentage of students had hand-spans of 22 cm or more?
3%
15%
45%
28%
The table below shows the variation in the colour of a population of beetles.
What kind of variation is stated in the table?
continues
discontinues
genetics
environmental
The table below shows how the lengths of a species of beetle varied.
What kind of variation is stated in the table?
continuous
discontinuous
genetics
environmental
The scientific names of two bears are given below:
Polar Bear - Ursus maritimus
American black bear - Ursus americanus
Explain why their second names are different?
because they live in different places
because the second name identifies each individual species
because they do not roar
because it identifies their diet
Zedonks are born when a female donkey breeds with a male zebra.
What name is given to animals like the zedonk?
Pure Breed
Hybrid
All Breed
A new specie
The diagram shows a selection of animals.
Which vertebrates are reptiles?
A and B
A and D
A and E
A and F
Below are vertebrates that may belong to a different vertebrate group.
Name the vertebrate group of animal D.
Mammal
Fish
Amphibian
Reptile
The duck-billed platypus spends a lot of time in the water. It eats small invertebrates which it crushes with its bill. Its body is covered with hair. Females lay eggs and keep them warm until they hatch.
Which of its features shows that it is a mammal?
It spends a lot of time in water
It is covered with hair
it eats small invertebrates which it crushes with its bill
female lay eggs and keep them warm until they hatch.
Three different invertebrate groups contain worms:
Which group does this animal belong to?
roundworms
annelids
flatworms
earthworms
Explain why a fly is classified as an insect but a spider is classified as an arachnid.
a fly has wings whilst a spider has none
a fly is non venomous unlike the spider
a fly has six legs whilst a spider has 8
a fly is dirtier than a spider
This animal feeds on dung. Use its features to decide which of the following groups it belongs to.
mollusc
arthropod
echinoderms
cnidarians
__________ grow from seeds produced in cones.
Flowering Plants
Conifers
Mosses
Ferns
The diagram shows the particles in solid water (ice) and in liquid water.
Describe how the particles move in the solid.
the particles in solid move faster due to huge distances between them.
the particles in solid moves pass slide each other.
the particles in solid are vibrating at fix points.
the particles in solid do not move in any way since there are no spaces for them to move.
In the diagram below, each arrow represents a change of state.
Which arrow represents freezing?
A
B
C
D
Oxygen is a gas at 20 degrees celsius.
Use ideas about particles to explain why oxygen gas can be compressed.
the gas particles don't touch each other
the gas particles move around, in and out of each other
the gas particles touch each other and are in a regular pattern
the gas particles cannot be described.
A student heats a piece of solid metal. The metal remains solid. Why does it get bigger?
Choose the correct answer below.
the particles get bigger.
the particles get further apart.
the particles move around from place to place.
the particles moves closer to each other.
When liquid water boils, the strength of the attractive forces between the particles _________.
increases
decreases
stays the same
disappear
The table gives the melting points and boiling points for five substances.
Name two substances in the table that are gases at 20 degrees celsius.
Chlorine and Iodine
Bromine and Iodine
Chlorine and Krypton
Krypton and Osmium
A student does an investigation to find the solubility of different substances in water. She writes down her results.
Which three pieces of apparatus the student might use to do the investigation to measure temperature, mass and dissolve the solute in the water.
thermometer, burner, stirring rod
beaker, stirring rod, balance
beaker, burner, stirring rod
balance, thermometer, stirring rod
Bromine can exist as a solid, liquid, or gas. The diagrams show the arrangements of particles in each of these states.
A student collects data about Bromine.
Melting Point of Bromine = -7 degrees Celsius
Boiling Point of Bromine= 59 decrees Celsius
Give the letter of the diagram below that best represents the particles in Bromine at 20 degrees Celsius.
A
B
C
None of the above
A student measured the uptake and release of carbon dioxide from a plant during 24 hours. it was a very bright, sunny day between sunrise and sunset.
State why plants release carbon dioxide at night.
Plants do not release carbon dioxide at night
Photosynthesis takes place during night time
Respiration takes place during night time
Plants needs energy only at night time
If people visit Mars in the future, they will need to live inside biospheres like this where they can grow plants for food.
Mars is further from the Sun than Earth is. Explain how this could affect plants.
The amount of light energy entering the Biosphere does not have any effect on the plants.
Light energy on Mars is more than enough to sustain the plants in the Biosphere.
Plants won't be able to produce food efficiently.
As long as water and carbon dioxide is present, plants will be able to live normally.
Nettles grow wild all over Europe.
Aaron observed the leaves on nettles growing in dim light under a tree. He compared them with the leaves on nettles growing in bright light nearby.
What is the reason for this difference?
Nettles in dim light need a wider leaf to capture enough light energy for photosynthesis.
Nettles in bright light need a wider leaf in order to capture enough light energy for photosynthesis.
Nettles in dim light need smaller leaves in order to capture enough light energy for photosynthesis.
The difference in the Nettle's leaves is nothing to do with light.
Scientists planted young trees. In one area the young trees were far apart. In another area, they were together. After 100 days they measured how much taller the threes had grown.
What is the possible explanation for these results?
There is not enough evidence to make a conclusive statement.
The difference is due to the difference in mineral contents in the soil.
There are enough resources for both experimental set-ups.
There is more competition in resources in 10 trees per square meter.
Kazim wondered what makes leaves green. One possible explanation is that they have a green substance that absorbs light energy.
To test this explanation Kazim grew two plants. One plant had green leaves. The other had white leaves with a patch of green in the middle.
Does Kazim's Evidence support his explanation?
Yes, because the plant with purely green leaf grew taller due to the faster photosynthesis rate.
No, because the plant with white and green leaves has grown relatively tall.
Yes, because the plant with white and green leaf grew taller as a result of photosynthesis.
No, because each plant is genetically different regardless of its leaf colour.
Mambwe injected radioactive sugar into a leaf on a tomato plant. Then he pointed radiation detectors at the leaf and at a tomato.
The diagram show how the detector readings changes when he left them for 24 hours.
After 24 hours, would you expect to find radioactive sugar in the plant's roots?
No, because glucose ends up only either in the leaves or in the stem.
Yes, because all parts of the plants need glucose for respiration.
No, because glucose is stored only as starch in the leaves.
Yes, because the roots of the plants also need to photosynthesize.
Four students in Mr. Dita's class make the following observations. Choose which student is CORRECT
Shelby says that all microorganisms are only found in the ocean. Some are helpful, but some are harmful. It's best to shower after swimming at the beach.
Garry says that all microorganisms are harmful. This is why we must get vaccinations and antibiotics from the doctor.
Jonathan says it's impossible to become sick from bacteria. Only viruses and fungi can make a person sick. Make sure to sneeze in your elbow to prevent the spread of germs.
Ireland says that some microorganisms are helpful and some are harmful. The best way to protect ourselves from harmful microbes is to wash our hands with soap and water.
A farmer grew the same crop for 5 years. Each year she measured how many tones of crop grew.
She drew the graph below.
What does the graph show?
It shows consistent crop production each year.
It shows how crop production increased each year.
It shows how crop production decreased each year.
It shows how crops adapt to environmental changes each year.
Harvey didn't believe Galen's idea that the heart made blood. Suggest why?
because Harvey does not have enough knowledge about the heart.
because the blood will not be produced that fast
because the heart only produces plasma
because he thinks the heart is the seat of human's emotion
The diagram below shows two of the muscles used to kick a football.
What happens to the footballer's leg when muscle A shortens?
The leg will bend.
The leg will be stretched out.
the leg is not affected.
the leg will move sideways.
Below is a diagram showing the location of different organs.
Organ A makes your heart beat faster if you are frightened. Name organ A.
heart
liver
stomach
brain
A haematologist compared the oxygen and carbon dioxide in blood entering and leaving a patient's lungs. The results are shown in the table.
A patient with lung disease may have much less oxygen in the blood leaving their lungs. Explain why that could make them feel very tired.
The body cells will have less oxygen to respire to produce energy.
The body cells will have more oxygen to respire to produce energy.
The body cells will have less carbon dioxide to respire to produce energy.
The body cells will have more carbon dioxide to respire to produce energy.
When Jules climbed a mountain her hand got so cold that blood stopped circulating through her fingers.
Suggest why that made the ends of her fingers turn black and die.
the cells stop respiration and die due to poor circulation of oxygenated blood.
the cells stop photosynthesis and die due to lack of heat.
the cells melatonin increases in number resulting in black colour of the skin.
The cells increase their ability to produce heat in extremely cold conditions.
A dietician measured the amount of glucose in an athlete's blood after they drank a glucose drink or ate a meal.
What does the graph show?
It shows that glucose drink gives a burst of energy only for a shorter period.
It means that taking a meal does not help athletes win the competition.
The glucose drink is the perfect alternative for your meal for an extended period.
The meal alone can give you a burst of energy for both the short term and long term.
A neuroscientist compared the time drivers took to put on their brakes when they spotted an accident. Her An average adult's heart beats between 70 and 80 times per minute. Regular exercise keeps a heart healthy. A sports scientist plotted a graph to show how much the heart rate should rise during physical activity to keep the heart healthy.
What is the recommended heart rate during exercise for someone aged 50?
90 beats per minute
91 beats per minute
92 beats per minute
94 beats per minute
A neuroscientist compared the time drivers took to put on their brakes when they spotted an accident. her results are shown in the bar chart.
What does the result show?
It shows that glucose drink gives a burst of energy only for a shorter period.
The younger the driver's age, the faster the average reaction time.
The older the driver, the faster the average reaction time.
It cannot be determined because the reaction time varies from person to person regardless of age.
Kasini collected data about broken bones in the lower body.
Which bones are broken most often by each age group?
Ages 10-19 (Foot) and Ages 60-69 (Hip)
Ages 10-19 (Hip) and Ages 60-69 (Foot)
Ages 10-19 (Ankle) and Ages 60-69 (Upper Leg)
Ages 10-19 (Upper Leg) and Ages 60-69 (Ankle)
Scientists found these on the sea bed. They could be crystals, or they could be living things.
How can scientists prove that it is a living thing?
Observe the colour change.
Measure its growth over time.
Measure the rate of photosynthesis.
Destroy it
The same apple was photographed on the day it fell off a tree, and 2 weeks later.
Name the type of organisms that caused its appearance to change.
Protozoa
Algae
Fungi
Virus
This apparatus was used to ferment fruit juice to make wine.
The fermentation lock lets bubbles of gas escape. Explain why wine-makers can't just leave their bottles open.
The bacteria in the air may get into the wine.
It affects the expiration of the wine.
The virus in the juice may escape in the air and will start spreading rapidly.
It may produce an entirely different type of wine - in terms of flavor and alcohol content.
According to the graph, when did the amount of alcohol start to stop rising?
8th day
9th day
10th day
11th day
Simisola used bacteria to turn some milk (pH 6.7) into yoghurt (pH 4.5).
Use her graph below to estimate the temperature need to produce yoghurt in the shortest time.
between 25 and 30 degrees Celsius
between 30 and 35 degrees Celsius
between 20 and 25 degrees Celsius
between 34 and 40 degrees Celsius
A Scientist put fresh meat in two jars and left it to rot.
One jar was open (A) and the other was sealed (B). Flies flew in and out of the open jar and laid their eggs in the meat.
Which meat would Pasteur expect to fill with maggots?
A
B
A and B
neither A nor B
Below is a typical animal cell.
What is the function of the nucleus?
Controls what goes in and out of the cell
Controls everything that happens in the cell
It is where most of the cell's chemical reactions take place.
It is where photosynthesis takes place.
